I will not bother the forum with yet an other I've been mugged in Paris story, nor the alleged ethnic origin of the low lifes who got about $150 cash out of my use now stash, but as I did follow the good travel advice of splitting money CC/ and passports, it was only a small cash loss, not a stop the trip CC or passport one. The best thing to say is that my not too old parents walked away unharmed, and with all their belongings in tact.
The most shocking thing was when my French wife described the incident to the French Metro worker, their response was I'm sorry, that happened on the French RAILWAY system, that train is not our responsibility. As my wife is a native, it had nothing to do with a tourist bias .... I think the criminal gangs know all the tricks!
Even if they need it more than I do, I earned it ...... the straights are not dire enough to resort to theft. Often times in France their camping caravans ( trailers ) are pulled by Mercedes. I have personally seen this as I had to walk by an encampment on my way to work.
Dave